From 75d3fc60f88e08bf953063819a8a04b881d6db23 Mon Sep 17 00:00:00 2001 From: Michal Schmidt Date: Tue, 29 Nov 2011 23:14:36 +0100 Subject: [PATCH] shutdownd: use PassCred=yes in the socket unit Since Linux 3.2 in order to receive SCM_CREDENTIALS it is not sufficient to set SO_PASSCRED just before recvmsg(). The option has to be already set when the sender sends the message. With socket activation it is too late to set the option in the service. It must be set on the socket right from the start. See the kernel commit: 16e57262 af_unix: dont send SCM_CREDENTIALS by default Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=757628 --- src/shutdownd.c | 6 ------ units/systemd-shutdownd.socket | 1 + 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/src/shutdownd.c b/src/shutdownd.c index 0ffa8b28..46856b01 100644 --- a/src/shutdownd.c +++ b/src/shutdownd.c @@ -173,7 +173,6 @@ int main(int argc, char *argv[]) { }; int r = EXIT_FAILURE, n_fds; - int one = 1; struct shutdownd_command c; struct pollfd pollfd[_FD_MAX]; bool exec_shutdown = false, unlink_nologin = false, failed = false; @@ -205,11 +204,6 @@ int main(int argc, char *argv[]) { return EXIT_FAILURE; } - if (setsockopt(SD_LISTEN_FDS_START, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) { - log_error("SO_PASSCRED failed: %m"); - return EXIT_FAILURE; - } - zero(c); zero(pollfd); diff --git a/units/systemd-shutdownd.socket b/units/systemd-shutdownd.socket index bc0358a3..13b6c7a5 100644 --- a/units/systemd-shutdownd.socket +++ b/units/systemd-shutdownd.socket @@ -15,3 +15,4 @@ Before=sockets.target [Socket] ListenDatagram=/run/systemd/shutdownd SocketMode=0600 +PassCred=yes -- 2.39.5